Frats is a stackable cup for drinks with cooling function.
The cup has a double wall in which there is a cooling liquid and can be placed in the freezer to cool it down.
Cooling liquid: saturated salt solution
Liquid volume 300ml, coolant volume 86ml
The cup consists of two parts, one for the inside and one for the outside. The connection of both pieces should be done
The cup should have a satin finish, the lettering in the cup rim should be glossy